The Wandel & Goltermann PRA-1 is a Frame Analyzer for measurements on 2048 kbit/s - systems. Features Simultaneous monitoring of two 2048 kbit/s multiplexed signals with frame structure to CCITT rec. G.704, §3.3 Recording and analysis of forward and backward signaling channels - trigger criteria user selectable Signals shown as a pulse diagram on printer or by means of an external oscilloscope Measurements of bit errors and delay time at 2048 kbit/s and in the 64 kbit/s channel (options) Receiver and generator section (option) in one unit Built-in loudspeaker for channel monitoring and alarms.